I'm running virtualbox using a ubuntu 11.04 host and win7 guest. Everything works fine except there is a huge mis-match with the audio. I have windows volume cranked right up, and yet it is barely audible on my system despite the ubuntu system volume being set at a comfortable level. I can get the win7 volume to a comfortable place by cranking the ubuntu volume, but that puts ubuntu sounds at a painfully loud volume.

Is there a way to increase the relative volume of the guest?